Valve-surfacing device



A. C. PAYSON.

VALVE SURFACING DEVICE.

APPLICATION HLED.JUNE1.2,1920.

1,409,764. Patented Mar- 14, 1922.

. 2 SHEETS-SHEET l. ngz 4 J7 i if Mld A. C. PAYSON.

VALVE SURFACING DEVICE.

APPLICATION FILED :une 12, 1920.

Patented Mar. 14, 1922.

2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE.

ARTHUR C. PAYSON, OF MILAN, ILLINOIS.

vALvn-sUR-FACING nnvren.

Application filed .Tune 12,

T 0 all whom t may concern Be it known that I. ARTI-iti: C. PAYsoN, a citizen of United States. residing at Milan, in the county of Rock Island and. State of Illinois. have invented a certain new and useful Improvement in `Valve-Surfacing Devices, of which the following is a tull, clear, concise, and exact description. reference bcing had to the accompanying' drawings, forming a part of this specification.

This invention relates to improvements in valve surfacing devices.

One object of this invention is to provide a device for easily, quickly and accurately re-surfacing or dressing down valves, such as are commonly employed in internal co1nbustion motors used on automobiles.

Another object of the invention is to provide a relatively inexpensive device of the character indicated which may be set up in a vice or otherwise clamped and wherein the surface of the valve is trued or turned always accurately with respect to the usual valve stem.

Other objects of the invention will more clearly appear from the description herein after following.

In the drawings forming a part of this specification, Figure 1 is a side elevation of a device embodying my invention, the same showing a valve in position to be dressed down or resurfaced.v Figure 2 is a vertical central longitudinal section of the structure illustrated in Figure 1 and corresponding substantially to the line 2 2 of Figure Figure 3 is an elevational view of one end of thev device shown in Figure 1. Figure 4; is a vertical sectional view corresponding substantially to the line 4-4 of Figure 1. Figure 5 is a detail sectional view taken substantially on the line 5 5 of Figure 2. And Figure 6 is an end view of a collet employed in my improvements.

In said drawings, 10 denotes a suitable base or frame upon rwhich the other parts of the device lare mounted as hereinafter described. Said frame 10 is preferably in the form of a light casting and is provided with a flat bottom 11 and vertical side walls near the bottom as indicated at 1212 so that the device may be easily clamped in a vice. To save metal and promote lightness, the frame 10 maybe centrally cored as indicated at 13.

In carrying out my invention, I provide means for rotatably supporting a valve and its stem, the valve proper being indicated at Specification of Letters Patent.

Patented Mar. 141, 1922.

1920. Serial No. 388,447.

14 and its stem at 15. Said means preferably comprise a sleeve or bushing 16 rov tatably mounted within a suitable opening 1T formed in the frame 10, said bushing 16 having a collar 18 at one end thereof countersunk within the frame 10 and exteriorally threaded at its opposite end as indicated at 19 and upon which are adapted to be screwed two lock washers 20-20. A brass or other suitable friction-reducing metal disc 21 is countersunk into the frame so as to minimize the resistance to the rotation of the sleeve or bushing 16. The bushing 16 is open from end to end and receives therein a collet 22. The collet is slitted into sections 22a'. 22h

and 22C, as shown in Figure 6, at its holding or clampingend and said sections are tapered as indicated at 23 so as to cooperate with a correspondingly tapered mouth 24 formed at the end of the bushing 16. The opposite end of the collet is exteriorly threaded and receives a manually adjustable knurled nut 25. By screwing the nut 25 up on the collet, it is evident that the latter will be drawn so as to securely clamp the stem 15 ofthe valve. 'Io prevent the collet from turning with respect to the bushing, the latter may have a pin 26 on the interior thereof with which cooperates a longitudinally extending slot 27 formed in the collct.

In actual practice, the opening wihin the collet will be made to accurately fit standard sizes of valve stems. different ccllets being employed for different sizes. I'Vith this coustruction, it is evident that the valve stems must be straight, otherwise they cannot be properly clamped and hence I avoid wasted time and energy in re-surfacing valves that have bent or distorted stems that cannot be used even though the valve surface is refinished.

As is well known, the active surfaces of the valves of standard construction extend at a definite angle with respect to the axis of the stem, this angle being450. Taking advantage of this fact, I provide a cross head 28 which is slidably mounted in guideways 29-29 that extend at the same angle, 450,with respect to the axis of the valve stem, as clearly indicated in Figure 2. The guideways 29 are provided with removable suitably rabbeted plates 30-30 bolted to the frame 10 as shown in Figure 3. The cross head 28 carries a nut 31 with which c0- operates a feed screw 82 as shown in Flgure 2. The lower end of the feed screw is jour naled in the frame l0 as indicated at 33 and at its upper en d passes through an opening in a plate 34 screwed orlbolte'd to the trarneV .10. Beyond the plate 34 the :feed screwv has secured thereto a bevel gear 35 and also a knurled sleeve 36, the latter and the bevel gear being pinned or otherwise rigidly cured to the feed screw. As will beevident,

rotation o the feed screw sliiits'the cross head 28 either' up or down at an angle of O with respect to the axis of the valve stem when the latter is held by the collet.

The cross head 28 is provided on its under side with an undercut horizontally extending guideivay 37 infvvhich is slidably mounted a cutting tool 88. Connected by a swivel .joint indicated at 39 is a horizontally extending adjusting screw 40 which is threaded in a depending flange 4l formed onrthe cross head 28. The outer end of the adjusting sci-ew 40 carries a rigid knurled nut 42. A small cutting tool 43 is carried by the tool holder 38,- said cutting tool 43 being secured in placek byany suitable means such as the stud bolt 44 indicated most clearly in Figure 5. As will be evident from an inspection of Figures 2 and 3, the cutting tool is so arranged that the cutting edge is presented to the surface of thevalve andivill turn down the latter ,in the manner of the ordinary y cutting tool employed on a lathe.

In order to efl'ect the movements ofthe cross head 28 Vand rotation Vof the valve in A,and 45, thereby effecting rotation of the synchronism, I employ the `following construction. The bushing 16 carries a gear 45 with which meshes a pinion 46 loosely mounted on a stud bolt 4'? cari'ied by the frame l0. The pinion 46 meshes with a larger gear 48 which is loosely rotatably ,mounted on a second stud bolt 49. VAThe gear valve and. its stem. y Y

Rigid with the gear 48 is a smaller gear 54 which meshes with a gear 55 splinedto a horizontally .extending shaft 56 mounted in lsuitable bearings 'formed in upstanding proiecti'ons 5,7 of the frame 10. Washers 584-58 are .pinnedto the shaft 56' so as to prevent longitudinal movement thereoll as clearly Y shownin Figure 2. The end of theshaztt 56 ,remoterfrom the gearv is formed With a bevel or spur gear59 which cooperates with Vthe bevel gear 35, ythe ratio of the gears 59 and 35 being substantially one to four.- The y ratioofl the gears 48and 5 4 is substantially Vvfoin-*toene and ofthe .gears 54 and. 55,1substantially one to two. The ratio of the gears 48 and 45 is substantially two to one. -I/Vithxthe construction described, it is evident that thecross head 28 will be fed very slowlyk butalivays in synchronisin' with the Y' rotation of the valve 14.V The cutting tool 43 will beshifted across the-face of the valve, always ina line at 45Ogto the axis ofthe valve'stein and the depth of the cut on the valve surface is adjusted by means of the screw 40. Forconveniencc in resetting the cross head 28 more quickly than is possible by means ofrotating the lever 52, I slip the gear 55 out oi"f .mesh with theV pinion 54 and then rotate the screivv32 in a reverse direction by meansV ot the knob 86.

With my improvements, it vis evident that I obtain a true vsurface on the valvesand one which is-independent of any special skill on thepartoif the operator and furthermore,

Vthe speed With which Vthe valves Vcan be dressed is very much greater Vthanthat `which now Vobtains under the'so-ca-lled grinding process and which a'reyinore or less'inaceurate. The cutting made by 'thetool 43 may .be madeV comparatively shallowor comparatively deep dependent upon the condition of thevalve and substantially l-no more time is requiredato re-surface a badly Worn' or pitted valve than in the ca-se ofone which is only. slightly Worn; As heretofore Y explained the useof the collet Iin kholding the valve stem Will automatically cause the rejection of any valves having the stein so deformed as to yprevent their further use regardless of the condition of the valve itself. rllhe cost .of manufacture or theAV device is comparatively small.; the same'V Vis readilyV portable andjitmay be usedininany shops v which are not now equipped to grind valves, thereby filling a long felt Want. Y Y j Although vI vhave herein shown and described-What I -now consider the preferred Y manner of carrying out the `invention,'the

same is Vmerely Villustrative and I contemplate all c'hanges and niodications Vthat 'come ivithin theV scope or the claims ap-A pended hereto.

I claim: n v l. In a deviccof the charactergdescribed, the combination'l with ai suitable ramegof means mounted on the-irame-'for rotatablyV supporting ay `valve having a stem and including a collet for the stemg, a cross head mounted to slide Von the frame parallel'to.

the true angle of the valve surface; Vmea-ns for advancing said cross headyatool holder mounted on the cross headgf andV Acommon operated, trains of gears Yfor, continuously.

and vsimultaneously rotating vthe. valve and stem-supporting 'means `and the cross head advancingmeans.`

2i In a device of the character described, the combination Vvvitha suitable frame; of

means mounted on the frame for rotatably supporting a valve having a stem.; a cross head sli dably mounted on the frame to move in a direction parallel to the true angle of the valve surface; a tool holder mounted on said cross head; a manually adjustable screw for shifting said tool holder on the cross head in a direction parallel to the axis of the valve and its stem; means for rotating the valve supporting means including a train of gears; and means, including a shaft, meshing gears and a screw, for moving said cross heat 3. En a device of the character described, the combination with a frame; of means mounted on the frame for rotatably supporting a valve having a stern; a cross head mounted to slide on the frame in a direction parallel to the true angle of the valve surface; a feed screw cooperable with said cross head to advance and retract the same; a tool holder` carried by the cross head; manually operable gearing for effecting simultaneous rotation of the feed screw and said means, said gearing` including a splined gear read ily disengaged from an adjacent cooperatgear; and independent manually operable means for rotating said feed screw when said splined gear is so disengaged.

4c. In a device of the character described, the combination with a frame; of means mounted on the frame for rotatably supporting a valve; a cross head slidably mounted on the frame to move in a direction paral lel to the true surface of the valve; a toolholder slidably mounted on the cross head to move in a direction parallel to the axis of the valve; manually adjustable means for advancing or retracting the position of the tool holder axially with respect to the valve; means for advancing or retracting the cross head; and means for effecting rotation of the valve supporting means.

5. In a device of the character described, the combination with a frame; of a valve stem-holding collet rotatably mlounted in the frame; a cross head slidably mounted on the frame at an angle of 45 to the axis of the collet and adjacent one end of the latter; a tool holder adjustably slidably mounted on the cross head in a direction parallel to the axis of the collet; a feed screw for effecting movement of the cross head; and common manually operated gearing for effecting continuous rotation of the feed screw and the collet in synchronism.

In Witness that I claim the foregoing I have hereunto subscribed my name.

ARTHUR C. PAYSON.

Witnesses:

WM. H. PAYsoN, F. H. HARRIS. 

